Vacuum liquid-feeding apparatus and method therefor.



I c.L.YsT0 KES. A l VACUUM LIQUID FEEDING APPARATUS AND METHOD THEREFOR'.

APPLICATION FILED AIR.I5`.1KIIIi` 4 Patnte. June 1.9;, 1911.

- 5 S'HEETS-JSIIEET I.

I I l I `I c.L.sT0KEs. .v l VACUUM .LIQUID FEEDING APPARATUS AND METHOD THEREFOR.

APPLICATION FILED APR-15,'19I6.

Patented June 19, 1917.

i I s skins-SHEET 2 lill/111111,11".

1 -c. L. s ToKEs. VACUUM LIOUIDTE'EDING APPARATUS AND METHOD THEREFOR.

1 APPLXCATION FILED APH.`15| |1916. 1,230,832.

Patented 11111619, 1917.

'c.L.sToKEs. VACUUM LIQUID FEEDING APPARATUS AND METHOD THEREFOR. APPIJCATION FILED APR. I5. ISIS.

1 ,230,832. I A i' Patented June 19, 1917.

s sains-snzn 4.

STATES PATENT OFFICIEL.

cnimmas LAWRENCE s'roKEs, or mLLoNG, vm zonneA NEW sewn. WALES,

' AUSTRALIA. a

VACUUM LIQUID'FEEDING APPARATUS A'll) METHOD l To all "Mom it muy cou/wm.'

lle it. known that l, tn.unaslmtvnl-zxri: S'roxna, citizen o'l' tlu l'nited Ahtatcs ol' America. residing at .\'lillong, via Young,

.trihuting system as the case may he.

The invention includes a lncthwl whereby nithol' the, llli-ight to which the gasolrnc ol' other liquid may hc sucked h'v the. available vacuum may he vcry considerably increased or the niininuuu vacuum on which u given.

svstcrn will successfully pump, in considerahly lowered.V For Sucking gnsolene to the engine' from thev rear tank of an automobile,

imm-ovmm-nt in hoth the aliove partieuli'irs in desirable xvluintlucar is lahoring up a relative ly .steep grade.

The method involves rcstrietedly admittingl air into the' column of gaaolent heil the. miglio, t ils: lightening. thc .wt-ight of the colunin and a-t the saine tinurarlnirftliut: the untrained airV which is` afterward utilized as part of the explosive charge in the engine.

The invention also includes certain iin- 'provedapparatus cnpahlc ot' operating in accordance with said n ictliod.

The Invention` hotll method and apparatus` is herrin shown as embodied in aV gano thc gaaolone and cntrained v'air pans lg through thclift pipe arc suektlalvintoafhigh liquid so raised .is retutned'to the low 'level storage tank h v gravity.

The lnjoad invention" does not require the.v

use of automatic vulves in the hiifh level reservoir for the purpose of-va-rying or' lacca ki ng titi-[vacuum or go'vt'frning the mori-.- mental of the'liquid or ai r aud although auch valca may he' used whilc retaining the essential features off the invention,"they are,

not shotvliin the specific apiialatual selecttal.

for illustrati@ in the drawings.

Speciation of Letters konnt..

lifted l'roni the rear tank to` -qiipe tl'ieie `y column in Said ascension pipc and so prou Piumino .now` 1o, 1an.

Application mea Api-ii 15, une, smal No, 91.303.

'l`liapplication (li'thc imcntion to a luhrirating oil'systcin and to a tuel oil system arc quite iinlependcnt, the one of the other, hot thc apparatus i5 substantially theI fame irhcthcr cniploy'ed for feeding gasolene to .ay carluircter or feedingr of lu'ln'icating oil in a constant level splash lubricating;r system.

- In the application ,of the invention for the' feeding ot' vo'il luel the high level feed reservoir may forni part ofthe carl'niretertructurc, in which euse it takes* theplace of the" usual loat eontrol fuel level device, o r it may he fitted separately from a carbureter which lcontains such a feed control device, and in the latter rase is usually mounted on the dash-hoard of annutoinobile or elsewhe re above the lcvel'iif the service required, and [')referalily construe-ted in such a inanncr that the fiow of fuel through it is observable. t

The spec-itin apparatus herein shown compris-cs means for admitting a limited quantityyof air into the ascension branch of n' loop pipcI system connecting.7 a low level tank and a high 'level feed reservoir', a vacuum c'rinncr'tion from the uppeif part of said` feed reservoir totll'e induction system of theeh- ,f fine. and a vl'ucl service eonnection from the lo,\vcr part ot' said reservoir to the eaifhureter. 'i *f lt is in this ipparatus necessary that the degree of vacuum ixr the high levi-l feed ,rt-s ervoir shall he approximately equal .to the degree of vacuum around thc jct, nozzlel or equivalent fuel utakc part in the carburetor, for i-lI it he greater or less thc carhuletel would he rith'c'r starrt-il or flooded. A loiv degree olI` vacluun onlyV is necessary for the operation olA thc loop circulatingr system, inasmuch as thc. ascending and descending rolum'nfI in thc loop lialancc` as theyare ap- .proxinnitelv Vcqual in height, and it is re quired oi" "to apply a sulicii-nt: degree of suctriont l'ingr 4oinc 'to diminish thc gravity of the motecirculation upivardlv through it.

4It iS immaterial whether the air heentrained hy thetlowing lucl or thc. fuel cntxained hy ai'' passing through [lie-ascension pipe. Thc operative condition is satisfied for insuring circulation through the loop if the ani-mision liiuh ol' tlloop` carrieraA a' proportion .of air sutlicient to dipturh'the hydrrr static halaneq otherwise existing `and 'that air into thc ascension 2 Lacasse thus a circulation of fuel is procured atv a F ig. 8 is a sectional view of a ca i'bureter rate at least equal to the maximum demandwith the vacuum feed reservoir formlng part 'of the engine. It has been established prac' of its structure; 'tically that ja very small. quantity of air Fig. 9 is a semi-diagrammatic'view' exl under a-low vacuum suffices for this purpose. planatory-of the application of the inven- 70 fr vThe necessary degree of vacuum is obtaintion to an engine lu ricating system of the able in the locality of the jet nozzle in many wellknown constant level splash type. standard t pes of carburetei's,v and in ythe It will understood that for any parcase of car ureters of the type in which the' tisular engine an appropriate proportion in While the motor is idlin i o'r runningslow, a termined so that with suchen 'ne the". appacontrol may be readily fitted in thejair inlet ratus may operatev entirely withoutvalves; of the carbureterl to establish a suic'i'ently but in orden to re ulate standardizedltti'ngs highdegree ofpalrtial vacuum around the 'to suit anyone o v a variety of-vengiiiesiand `jet/and tol procure an. approximately'equal to operate under different hydrostatic heads 80 degree of vacuum-,foithe time being'in the l (determined by the height of the resem high-:level feed reservoir. Under these con- Voir above the fuel `tan it is desirable to aditions,.fuel.will besupplied fromthe reserlit tolsiich standardized a voir through the jet of the carbureterobedimanual controls lto lfauzilitat-e such regula` ently to the velocity' of the induction draft tion, butwhen these contrls have been regu- 85 Soperatingat the'nozzle mouth, 'as is well lated for any particular `engine, they'may be f known-in ca'rbureters in which the fuel level fixed permanently.'

is maintained'at or slightly below the mouth In the drawings the same -fgu Y. of the nozzle.vv

pparatus certain resof refeience indicate corresponding parts.

. represents thefapparatus, as it would beI which relate to gasolene or other fuelfoil fitted to an automobile, with the Ahigh lei/elf supply to an engine carbureter,

feed reservoir associatedv directly with a A16 is the ascensionliinb and 11 isthe re .carbureten and dispensing with-'the necesturn flow .limb of the loop` pipe circuit. 3 sity for a: fioat control for the fuel feedicto These two li-mbs termina said' carbureter; .Y low'flevel tank 12, as shown in Figs.-1, 3, 4, Fig. 2 '-is an.. enlarged `vertical sectional and 5, but in the case vof Vthe arrangement v-view through the high level fuel feed reservshown in Figs. 6 and 7,. terminate in the in- Vvoir; `Vtermediate.service tankhl. 14 is tliejhigh Fig. '3 isa detail sectional view of an air level feed reservoir-,1,5 the vacuum pipefrom' 100 A admission and control device in the ascen-` said reservoir-14 tothe carburetor 121,16 isA vsion liinbmf the pipe loop which connects .the engine induction connection," 17 'the thev low level tank with the high level feed chamber containing the .float controlled fuel reservoir; level valve' usually a'ssociatedwitli a carbu- 0 Fig. 4 is a sectional view through a low reter, 18 fuel feed pipe from .the reservoir 105`V level tank showing an alternative construc- 14 to the carbureter, and 22 a balance tion, mechanically equivalent with the' conbetween the pipe 15 and the top of the oat 'struction shown in Fig. 3, for the fitting'of chamber 17. 19 is a manual control valve in the two ulimbs of the pipe loop in the tank, the vacuum pipe v15, and 20' are fuel stop "and for admitting and controlling airsupvalves, 21 areair admission lfittings vin the "110 plto the ascension limb of said loopj; ascension limb ofthe fuell loop pipe. De#

" igev is alternative tol Fig. 4' and is a tailsof these air admissionttings are shown similar view in whichair is admitted in a iniFigs.'3,-4,gand

lower position into the ascensioi'i limb of the-v 'The carburetor 121 ,50 pipe loop, the arrangement shownin Fig. 4 carbureter of knownbeinghowever'considered preferablein use floatlfeed h b for reasons' which will b e hereinafter 'exderstood that-I am not restrictedto the eilt'- plained; j ercise of my.; invention in connection with Fig. .5* is a detail section showing aV this orv any other particular 'constri-ictionof variant formof `check valve ,to be used in i' u-lar construction ifs'illustrated inthe draw! .with Fig: 5.- i e ings for the purpose ofjexplaining the in- Fig. 6 is a semi-'diagrammatic view show-A `vention. 1" f y jing the fitting of the apparatus to. .anf-auto- It is desirable but not` necessary that the eo .mobile with an intermediate low-level serv-v air lshouldbe admitted into the ascension 1.25 ice' tank, whichv is` suppliedwith fuel from limb at a point above the level of the surface a main tank of relatively large capacity;r of theliquid'fuel in the low level tank 12.;

Fi'g. 7 illustrates an alternative'detail of Referring particularly'to Fig. 3', 50-'is the construction of this intermediate low level neck collar-of the'low leveltank- 12,-151`isla' service tank; cap screwed into said neck, and-'52E a loosev 1 A 41.13?

10 main jet nozzle'is not under partial vacuum the areaof the pipes and vents may-be de 75 25 In the-accompanying drawings, Figure 1 l Referring to Figs. 1 to 8 ofthe-drawings, 90

te at the foot in a 9 `5 .carb'urete r,notwithstanding.that a' partie 129 A the arrangement described 1n connection v brought yinto sis' . lower position.

enoug to force fuel out through the air adM mission vent. 53 is an air admission collar. into the upper end of which the aseenshiii pipe'10 is screwed. A nozzle '54 on the end of the lift pipe- 55., which in etlect forms a lower extension of the ascension pipe 10,

serves'to deliver oil 'which is. brought up throligli'the pipe. into' the limb 10. There isa clearance around the nozzle 51 through which air passes u 'i into the pipe I1U, with the. fuel; this airbeing admitted through an aperture 15.1 loading to ati'nosphere, and a vent 56 which controlled by a pin valve 5T, The pin val ve 57 la set to allow that quantity" of air to pass in througl'i. the vent 155 which siifiices .to lighten the gravity of the column as'cendifng in the pipe lfll'und thereby disturb the hydrostatic balance which would other- Wise exist between the columns in the pipes 10am] 11. The lower end of the pipe is pre'fernbly ctn-'ered with a gauze strainer 58, andlocatednear the bottom of the tank 12 or inta, :sumpY so that fuel ran be drawn when only a' small quaijititjvv is contained. in the tank. The'returirlmh 11 of the pipe loop is the `tank 12 at any convenient place, and within said tank; its extension, 59 is fixed in a. lop* position or in a sump so that the` mouth -of said pipe 59' will be al- .wavs covered by, fuel..

i l rhe.alternative,form of this fitting shown inFig. 4; is mechanicallyv equivalent, and as al matter Vof convenience the pipe 11v is brought.- into the reservoir 12y through the" A capl', and the nozzle 51 is fixed at a slightly The air controlpin Avalve 60 Works in. a tappedhole 61 inthe cap and ooptrole the air admiseion vent 622to'the air )lar h3. which surroundethe nozzle 5.4, ()iie or more slots (54 .cut inthe side of the nn ilierethrough to the, air admissionw'ent 62.

l"In order tbatfthe 'system may.. work. with degree of p of air admission .to the as' 51 Should he located no .higher thanjs nenessary' above the highest level of thefuelcon- 'tained -in the. reservoirlZ. tion Shown lin Fig. 4 brings/the 4nozzlep't-a little lower than the..eonstr'urstion4 shown in Fig.. 3l and is therefore preferable lt is however vpossibleto-operate, the sys? tem when. airis admitted. near the `footof vthe ascension pipe, but in this ease it is neces-l sary 'to provide en 'aiitomatic check valve in the return pi 1l. y f l The extensionpipe T0 (Fig. 5') of the ascension pipe 10 is broughtinto a collai- Tl having lateral ports; lcommunicatingwith "pipe 74 so as to project upward into valve 60 `serve vto adniitgatmospherevacuum and `with,A

connecting the low The' construc- 20.111213 bejitted` in this I check, valve 106 is provided to prevent lift y an annular space 73 contained between said pipe and un inclosing pipe 74, and an oil nozzle 75 isiitted inthe bottom of the.

the contracted portion oflthe collar 71.- 76 isv a gauzescreen. 77 is a pin valve correspondf l ing with the pin valve 57, Fig. 3,control ling admission of atmosphere to the annular Space 7,3. The foot of' the return pipe 11 is fittedV with a cage 8() forming a guide for from dropping out of said cage -by a check pin E52, but'by preference., the check valve Sil (see Fig. 5) is fitted near the top of (lie tank l2.

The pipe 15 is connected into lthe head of the high level reservoir 14. A pin valve Hl is itted to control the area of the vent. The ascension pipe lOis coneetedinto the upper part of the reservoir 14, but it 'a float' ball valve 8l whifh is prevented may bebrought in through the bottom of it.

In the latter case undesirable turbulence of the fuel in the reservoir occurs. 87 is a baille within. said reservoir against which the air, the vapor mixture,` and the inflow ing; fuel 'which pass in through the pipe connection 88 are mechanically separated,

the liquid falling into the bottom of tho I reservoir, ivhile the air and vapor'pass up through the baffle 87v and thence throng the vent and pipe 15 to the-engine in` duction system. The reservoir '14 preferf ably constructed with a glass barrel `89 through which the lion' of"fiiel into it andy the level ofthe 'fuel contained Vin `it may be` observed.. 90 is an overflow sta-nd pipe; the heightv of the mouth of this `pipe above the bottom of the reservoir determines the normal'fuel level therein, (see Fig. 2). foot Vof lthin stand pipe 90 is connected to ythe return pipe 11 leading to the 'low level is con f Ainto theair admission fitting V(eee fiiel tank. The foot' of the pipe 1() nested 3,' f1, and. 5).

' Eiga 6 land-7 are explanatory of a Supplelental'y device -which is intended 't0 facili" 'tate fitting ofl appmratus according to this invention on existing motor vehicles.

il In this ca'septhe loop system, 'instead of leveltank 11.2 to the high level feed reservoir 14 connects ari intermediate low level service tank 13 to sai feed. reservoir I4. the details ofvjthe loo .bein exactly the same as already describe "Ihrel ow leveltank 12 is connected by. a pipe to the intermediate tank 13; a stop coc pipe.` An` automatic 13 to .the main tank `lil-but to admit liquidto The.

How in the contrary rlirecto n'. Thejtan'k 13 is fitted in a convenient positioninlthe locality of the enginejand is always kept char ed through the pipe 105. It` will usua 1y contain liquid above the hydrostatic-level of the liquid in 'the tank 12 for theA reason that in downhill runnin slowing up, liquid will pass forwar to said tank 13 while under no circumstances can it pass'backward. 11n 'the alternative ar'- rangernentgshown in ig'. 7 the i e 105 is mediate tank 13 'is thus constituteda trap whichiskept filled in the manner already described but is incapable of discharging its contents except through the ascension4 limb, l of the pipe loop.

1 10 is a float raised check valveln the top of the tank 13 for the pu ose -of closi its atmosphere vent when 'e tank `13 is lled to overflow;

and in .brought into the forward side o t e inter-` mediate tank 13, nearthe top. The inter-l tity of liquid which is raised through the pipe 10 in excess'of the minimum demand of the engin In practice all these pipes'would be of slig I tly largerbore .than is' essential to operative success.

of .o ration is :is follows tiul vacuum is procured in theinterior 100' of the carbureter/ in the 'region surroundin in L L tteferring to Fig. 5', it will be noted that were `not fitted in the return` ipe 1'1, fuel would, be drawn'up bodily t rough. said' pipes 10 and 11 and circulation might not be established'. "The provision of the the nipple jet 101. A similar degreeo `vacuum is obtained in the higli level feedy reservoir 14 the top of which is in com'f -muni'catio'iiA through the pipe '15 with the If under these carbureter chamber 100.

' uite 'circumstances the; reservoir 14 is empty, vfuel will be drawn up throu h oth limbs und 11 of the loop 'and at t 'e same time air will be drawn into'the limb 10 through the oriicti. When the reservoir -14'has thus'receiv'ed a quantity, o f liquid Referring to Figs. 1, 2 and 4,; the method W en the engine is rotated to startit, par-4 fuel sufficient l'to cover the mouth of the overtlowfpipe 90,"circulation tin-ough the'loop commences, liquid'fuel-,andlair passing up `Under"su=ch circumstances if a check valve through the ascension limb '10, and ovcrplus' `to the4 presence of air among the liquid vofli uid returning through the limbv 11. 'The imiished head in' the limb v10`d'ue ltherein has the effect of v `disturbing the check valve `in-this case 'closes the pipe-119 so that vacuum'isl effective only for drawyin g fuel up'through the pipes 70 andlO.

.when-the other constructions aref-used as'l elsewhere described. The check valve(81 As soon, as sulii'c'ien't fuel has been 'so drawn up so esito-de letethe annular chamber 7f3?,

1o and recuperation -isfihen the same as or 911)4 comes to its seatingf'only until the returnlflowfis commenced'throughv the pipe .11; thereafter there is a continuous `c1rculavhydrostatic balance and insuring'a'continu' l'(by gravity). down lvthrough the plpe- 11, 'so

ous 'circulation up' through the pipe air admitted t 'rou'gh vthegifalv'e 'willpass i through the orts'72into the pipes 70and tion through the ,"loop and the feed reserinto the feed 'chamber 14and'the airwhich pa'sse'sup with the fuelisifinore or'less carb'ureted.'v The fuel value in this carbureted yiio cient bore to carryair and vaporwill, hc weve1zbe utilized, as all of -it passes lto the induction ofA theen# gine through the'pipe 15.` f

`The pipe`15 must hefo'f` sufficient borevtov pass the maximum volume 'of air andifuel vapor ywhichfkiomes intof'the reservoir 1 4 andv t el'a'scension "mum 'engineJ demand and l'alsolto carryA there-` f with the-quantum ofjair necessaryfto suf ciently disturbl thestitic balance. rnthe `loop 1 ,to procure. 'v contin'uous circulation .there {throuhlg The return pipe .'llof .the loop` 65.

y throu hthe'ascensionlimb 10 of theloo 1 0 must be of su giel in excess of the maxi-.v

ofr-'suilcient pass thatquan- -uel supplied to ya chamber.

pipel:A The valve 6() is adjusted to admit Just v'that quantity "of-air which suices to maintain a 'sufiicientlyrapid circulation, and

the valve '841 (or'119 6)- is adjusted to;4 lallow only aquantumo' air and va" r to be drawn through the apertureI 85 an 'pipe' 15 which will sufficeto vinsure 'the maintenunjceA e oi this circulation;` As the'carbureter jet 101.

is'subject to ap roxirna-tely the-'same degree of vacuum, as t e interior of the feed reservoir 14,--liquid may-flow hygiavitytbstatic- `level through the pipe connection 18, andzif the reservoir 14 Ais -set so that thetop.l of the overflow pipe therein is level'with'the mouth of the nozzle,"- fuel-wi'll-stand'iuthe nozzle always 'ust at the .mouth level therein, -Cony lsaid l'iludxuel may be entrained in and vaporize 4bythe-induction draft in hecarbureter in thesame manneras li uid.v

carbureter .through yiii oat f Assuming *thethere no difference in the operation.

abstimmen yoff die heilig shown in Fig-3 for that shown Iin Fig. 4,

.'When a" oat chanriber;l is associated with a; y carburetenythe' feed reservoirfll is placed on the. dash ola motor vehicle or.' atany position/in the location` ofthe Aengine -to be supplied, suiciently above thejlevel of the float chamber to insu-rethat fuel may always flow by gravity from the feed reservoir to the. This; is indicated vin Fig. 6,

limit chamber.

llow by gravity through the carbureter noz-V zlc 301 if the top of the oi'ei'lliow fi() in 'the reservoir 14 stands above the level of said nozzle mouth. Suitable means should be provided iii this case to close the nozzle when theengine is stopped, for otherwise the fuel contained in tht-,chamber 14 below the over- .'ow'level would be yi'asted, flowing into the carbiireter and Houding it, also it is very desirable that the reservoir 14 shall vbe located as close as 'practicable to thecai'liuretci' and if not art of its` structure, preferably in front o it when the system is fitted in a motor road vehicle, -in order that the fuel `supply may sul'cr minimum disturbance on account of variations in road grade and 'to insure maximum .fuel supply to the nozzle when the vehicle is on an up grade. i

As-sho'vi'nin Fig-8 the feed reservoir 14 is part of the` carhureter structure and the nozzle'draw fuel directlvoiit ol." the said reeervoir. l

`"Referringtto Fig. 9 which illustrates a lubrication system, 130 is the `feed reservoiry it corresponds in construction withthe'fee Aoverflow reservoir M shown in other figures, and the remaining'- ligu'res of reference indicate the aiime -operative i parte as those similarly identified in other figuresofatlie drawings.

131 is the oil` sump and 132 is an,oi1 tray into which the crank end dips. 133 4is the `pipe l-is' brought into th bottom vof the sunipll andthe lflow piV 11 is brought into the' pit of the V.tiayl f in order that it will alwaysbe coveredwith ried".`directlyinto the induction manifold 4or other part ofthe induction system where a Suitablevacuum einem.

When the uystem 'isfitted to a two. cycle engine the vacuum pipe of theffeedA reser- -voir isili-connected 4to thefcrank case ori-air.,

` supply cylinder or 4 equivalent Vpart -aud l fitted with a nonretiirn valve so that `a'. vaeu-v um condition is'assured inf the feed reser-V voir, While I have herein shown and descnibed peculiarly adapted to the practice'of myr invention, it will be understood that vari- ;:t through its pipe connec-v tion herein shown yclaimed herein, such subject mutter having And in this ease' Awhile thel carbiiretei' z l `means for adm itti'iiga, Vpipe 'of iiid loop. n

of `the trav 132. The, ascensionl oil. Ihe'Siic-- tionlpipe 134 is independent of the suction pipe inconnection with aifiiel feed sys- .luttent fitted -tkj the same engine, and it iscar- Y -temof the engine.-

ous cli-anges may he made in the from, ar rangement, loca-tion, number add functiom ing/of the vparte;.without de iarting from the 'spirit of my invention. t will also be obvioiial that certain of the alternative forms :is well as many of the details of construcare not specifically been reserved for other applications for Letters APatent fileil or about to be filed b rme i l.

liVhut I, claim a'armiv invention und desire to secureby Letters Patent isz'f 1. The comliinutiongnf Aa low level oill tank, :i high level oilfced reservoir, a vacuum connection fronifsaid' reservoir ada led to be litiedto the inductioneyetcm Lov an internal combustion engine, an"y ascension pipe and a down llow pipe connecting said reservoir. and tank yandforininlij*an oil. circulation loop, and meansl' l' or admittingair into Saidnscension pipe; f Y 2. The combination with a cai'biireter-for an,internal,combustion engine, of a feed' chamber and a placoinjaaid' carburetor where a condition of partial vacuum exists seing fuel` and i; intr/i tie ascension 3. 4In' cpmbination with. an internal com- -bustioiieiigine and a carbureter, ap aratiis Vfor, maintaining a count-ant floWjo liquid chanibex; therein 'which forma the head 4of 90 va liquid fuel circulation loopl terminating fuel to a high levetfeed igfeseijvoirfrom a low level.tank,.embodying agliqiid circula,- ton loop connecting'. into thereservoir and includingifzitV its` upper end, the naif] feed tank, the feed reservoirbeinitmiinected to `the 'carbi'ireter to nilppljy fuel thereto, means foi-'admitting i'iii'jinto'on@sfide of the circulation l'p'opf toliglitenthe column of liquid therein, and-means'. to apply the engine sucftion to the reservoir to drawai'i'vinto the loop `tof-lift the lightened column Vand to draw saidairout ofv thefeed reservoir into the engine, o ,t

4.' Ina-,tvacum ooerated apparatu'e for raisin fliqiiid fuel, rom e `low` level tank to ai igh jleiel feed reservoir and thence g serving an engine carhuretei'rwith Said fuel` a pipe loop `"connecting said reservoir and tank, ineanafo'r introducing air into one limb of said pipe, u -fue] feed vconnection `from,,isaideedreservoir to said 'eurbureter,

and a 'vacu-iimconnecti'on from the. upper partof said reseriiohiwr@tothe` induction sys= 5, In a. liquid `fuelgilifgt,iiPUpaintIis ppemtefl by vacuum, allow level ,elA tankiii high level feed reservoin'a fuel ascension pipe having itslo'wer endjlocated inthe fuel tank and its upper 'end leading into' the fee/(1 l reservoin air admission means into the ascen- .the'upwardly mo'ving column of liquid movsion pipe below the feed tank, means for ing' from the tank to the reservoir, and/comwithdrawing air4 from the reservoir, means munication means to apply to said liquid for delivering fuel therefrom,'anda returnv fuel' reservoir the suction which ie nii 5 .pipe adapted tocarry overplus fuel'` by plied to the carbureter to create a partial n gravity from the reservoir to the'tank. vacuum-in the reservoir.and to draw rfrom 6, AIn a vacuum operated system'for r'aiijsvthe tank the air whichenters it with 'the ingliquid fuel froml a low level tankto a fuel.

--higli ,level :feed reservoir associated with f 10. AIn 'combination with a carburetor, a the-'carburetei of anl internal lcombuetion low vlei'fel-,liqud fue] tank, a liquid vfuel. res- 75 engine,'tlie 'combination of'a: fuelv ascension ervoirv abovey said reservoir and in communipipe ada "tedfto connect said tank and'reslcation withthe carbureterv to supply it with i erveir and'havingin itslowei" part an lair fuel, communication between thetank and -a'drnirsisioi'i vent, 'a4 pipe adaptedv to connect reservoir, means y:for .reetrictedlyadmitting L .the upperl par't`"of said reservoir with the atmosphere to said communication atjanpoint a0 induction of the engine,"`an overflow from where the admitted atmosphere'entee-:the said reservoiradapted to be connected-,by a upwardly moving column of liquid 'moving return flow pipe to' said 'tank," and-a`pipe from the tank to the-reservoir, communica'- adapted to connect the lower part of said tion means'to applyl to said liquidfixg lesery, Q reeervoirwithv the carbureter fuel intake; voir the -Suction which is nppliedfto 'the 85 f 7. In'iapparfatus adapted to be fitted to carbureter to create apartialvacuu'm inthe a.' rondfvehicle for rraining liquid fuel by reservoir and tol draw from theftank lthe l .vacuumfroma low level tank to i-high. level air which enters'it with the fuel, and overv reservoir and returning surplus, of said fuel ow means in the reservoir with connection 2,, by gravity, the combination .l of a low level to the tank for returning surplus fuelfrm'no bulk tanka 'n intermediatelow level Service theieservoir'to thetank.

tank, a pipe connection from the bottom of 11. In combination with a carbureter hav' said. bulk 'tank to .said service tank, means ing a liftidfuel chamber, a low level liquid for. preventing return of' fuel through `said 'fuel tan a liquid fuel reservoir above Said l pipewhile permitting fuel toilow therereservoir -and in communication with the sitil through' into said service tank,"a pipeloop vcarbuieter to'supplyl it with fuel, [an ascenineluding -a high level feed reservoir and sion communication between thetankfand, jhavingiitsgendsfin said`service tank, means reservoir, an over w communication befor admitting airiinto one of Jsaid Apipes in-v tween the reservoir and'tank to c arryback .35 termed-inte neidiservice, tank and-saidreeto'thetankany surplus fuel, means for re- 10!! ervoir,;andfineans comprienga connection fstrietedly admitting atmosphere tvo-thans- "toa'n:v engine induction vservicefor exhaustoension communication at' a point vwhere the ing-aiinfrmsaid--reeenzyoinv,-Qv admitted air enters the upwardly moving'- -8.' 1`he combination witlian internal comcolumn v'of liquid; communicatiommeans to .hu'sition'l engine, ofay.; carburete'r', having a .l continuously apply'w the reservoir the same, 105 tloa't'level chamber closed atmosphere, a Suction that isiapplied to the carbureter to 'low levelliquid fuel-tank, ahigh .levelfuel create apai'tial vacuum in the reservoir\and. feedfreservoii'f having an overjiowlpilpe the 'to drawv from the tanlr` the airrwhichf'enters L lowerpart of 'sai-dftank, an as fcensiongpipe it with the fuel, and means toequaliz'e theA V Zrfoiii the lower pai'tfofsaid l.tank Y te `eaid ress'ure; on thefuelin the carbureterehain- 110 l"`reservoii-MmvalnreeLairadmission'-i'ent'fin er 'with thepreesuren the' fuel ,-iiijthe 'fsai faseensin =Pipl1ocated closeuebOv-.eethe 'wervoif veliffi'n said ftank, allpipe .Icoiinectionfwf'12. In combinationl' within' cai'gbreter, a fuppeifpart ofy-sadr` reservoir to, IlowIleve'l liquidfuefltank, a liquid fuel ree-f `mi.,ithen-#engine-fiitake, afuel feed pipe fron'theff ,ervoi'r above' thel tank* and communica- 115 'loweijl partei of eaidgf.r'e'seizvoiis,tmthejear-4 .tion with 'thecarbui-.eterlt :iup ly it with bii'eter iuel-intwkma. vacuum, equalzing fuel, a',communica-tion'betweennt e tank `and v vlP'lp'e `co'nfleeting;the upper partof said,.res` reservoir, means'for reetrictedlyledmittmg '1 'fervoii-f todv the per parto. the, carbureter. atmosphere tosaid'conmiunicationfatafpoint V551 float; levelcham er, and a-fbaflielin said4 res- Vwhere the admittedatmosphere ,with -120 ervoir'da-pted toiselierateliquidju the upwardlyr moving columnY ofl'iquid'-` fuel Vai1f s i nd apor. f v l g f `moving `from the tank to the reneinroir,y and 1 9.'.` Y "ibnationwth' l an.cai'bui;e`tei', a Ameans to controllably. apply .to 'aid reser- "l w leve'l liquid fuel'tank; a-liquid-fuelfres voix-.the suction-which ievapplied ,tothe-cap bureter-tosupplyitwith reservoir andl tofdraw therefromthe air uncatien-'bftweenathe' tank andwhich.enteremitgwiththeffuel; f

'- angifor-restrictedlyfadinitting 13, In ,aI liquid feed s'ystem for, an internal.

d communication aity a-.,.combuetion engine, the'. combination :of js.

'dtaiikand in pomrnunic-,J bureter maintain a partial vacuum in the 1 2'5 A liqudg' 'mal 'reservoir above said V130 tank, communication between the tankand the reservoir, means for admitting atmosphere to said communication at a point to enter the column of liquid moving upwardly through said communication, means for aipplying suction to the upper part of the reservoir said means carrying the admitted atimiisphere to mix with the carbureted charge of the engine,` and means for cutting oli suction to the reservoir.

14. The herein described method of liftg ing and supplying fuel to an internal combustion engine, consisting in raising a liquid fuel by application of the engine suction thereto, lightening the rising fuel by admitting to and mixing therewith a limited amount of air, drawing said air into the engine intake, forming of saidvlifted fuel a i carbureted mixture with air, and drawing .said carbureted mixture into the engine in take along with the first mentioned air.

1,5. The herein described method of lifting and supplying fuel to an internal combustion engine, consisting in raising a liquid fuel by intermittent application of the enine suction thereto, lightening the rising uel by admittinglto the same a restricted fuel by application of the engine suctionthereto, lightening the rising fuel b restrictedly admitting air to the fuel lifted, and thereby carbureting said air, saxi carbureted air being drawn by the engine suction into the engine, and forming a carbureted mixture ofair and the lifted fuel i `and drawing said carbureted mixture into the engine along with the first mentioned air. y y

In testimony whereof I have affixed my signature in presence of two wltnesses.

CHARLES LAWRENCE STEB.

VVitnesses: H. C. CAMPBELL, WV. I. DAVIS. 

